Buttonbush vs Nodding Onion - TreeTime.ca

Buttonbush vs Nodding Onion

Allium cernuum

Cephalanthus occidentalis

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Nodding Onion
Buttonbush

Nodding Onion is a native perennial wildflower known for its nodding clusters of flowers that range in color from white to pink to purple. The lightly scented blooms provide pollen and nectar for pollinators, especially bees, which can collect while hanging upside down, a capability most other insects lack.

The narrow, grass-like leaves of the Nodding Onion can be used as a seasoning in cooked dishes, though bulbs and raw leaves should not be eaten in large quantities. All parts of the plant have an onion-like aroma when bruised, which helps deter deer and rabbits. They can self-seed readily, so removing spent blooms helps manage their spread. Tolerant of a range of soils, including alkaline, it is well-suited for a variety of plantings, including pollinator gardens and naturalization projects.

Buttonbush is a moisture loving shrub that provides year round interest.

It has round, fragrant flowers resembling small buttons or pincushions. The flowers transform into small reddish-brown fruit that persists into winter while the leaves take on shades of red in fall.

Providing essential food to bees, butterflies, and other insects, this shrub is versatile. Try it in your next shrub border.

Nodding Onion Quick Facts

Buttonbush Quick Facts

Zone: 3a
Zone: 4a
Height: 0.3 m (1.0 ft)
Height: 2.4 m (8 ft)
Spread: 0.2 m (0.5 ft)
Spread: 1.5 m (5 ft)
Light: partial shade, full sun
Light: any
Moisture: dry, normal
Moisture: normal, wet
Growth rate: fast
Growth rate: medium
Life span: short
Life span: long
Growth form: upright to spreading, clump-forming
Spreading: seeds - high
Suckering: low
Maintenance: medium
Maintenance: medium

Toxicity: raw leaves and bulbs can be midly toxic

Foliage: smells of onion when crushed, edible
Flowers: white, pink, or purple nodding clusters
Flowers: large, white, spherical
Bloom time: late spring to summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, ON
Native to: ON, QC, NS, NB
Other Names: ladys leek, nodding wild onion